http://arxiv.org/pdf/math/0307321v2.pdfCan this be implemented? I am not aware of Group theory :) Apparently, this has a complexity of O(n^2) ! Thanks and Regards Sumit From: Karl Rupp <[email protected]> To: Sumit Kumar <[email protected]> Cc: "[email protected]" <[email protected]> Sent: Monday, August 3, 2015 1:23 AM Subject: Re: [ViennaCL-devel] ViennaCL reductions Hi Sumit,
> I was trying to run sparse matrix multiplication, but one of my explicit > template typedefs had Int. After some digging, I found out that CSR only > supported Float or double. Is there any reason for this? Can we also > have support for other templates? (like int ?) It is technically possible, but we haven't implemented it yet. After 5 years you are the first to even ask for it ;-) > Another thing would be the alignment order. Suppose I have a Row-major > Sparse Eigen matrix, then I can copy it to a (Row-Major ?) VCL > compressed matrix. What about a column-major sparse Eigen matrix? If you can point me to a fast, massively parallel column-major matrix-vector multiplication routine, I look into it. However, as far as I know, there is no such routine for general sparse matrices, hence it does not make sense for us to support it. Best regards, Karli > ------------------------------------------------------------------------ > *From:* Karl Rupp <[email protected]> > *To:* Sumit Kumar <[email protected]> > *Cc:* "[email protected]" > <[email protected]> > *Sent:* Friday, July 31, 2015 9:04 PM > *Subject:* Re: [ViennaCL-devel] ViennaCL reductions > > Hi Sumit, > > > I am aware that Eigen can do it for its matrices and I am also aware > > that VCL cannot do it natively. My question was this: > > In your example of interfacing with Eigen, you have shown a VCL dense > > matrix interfacing with an Eigen dense matrix. Do you have any example > > of interfacing an Eigen Sparse matrix with a VCL dense matrix? > > No, we don't have this. > > > > > Best regards, > Karli > > > >
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